Updated the knowledge of bending in sheet metal processing, get it!

Written in front: Bending is a sheet metal processing method. Sheet metal parts of various shapes can be bent to the desired shape after a few passes, which is convenient and fast. Updated the basics about bends, get it.
Keyword tags: CNC Machining Parts, Sheet Metal Processing, Sheet Metal Cutting, Sheet Metal Materials, Wire Drawing, Sheet Metal Cutting, Sheet Metal Bending, Bending Knives

CNC bending process:

The main parameters of the bending machine are: pressure and table length.

1. The main types of bending knives are as follows：

Large Machete Small Machete Sharp Cut Straight Cut Arc Cut

2. The main application bending types of various tools.

(1) Straight knife: It is generally preferred to bend only one bend without considering avoidance.
If the following situations occur, you need to consider avoidance.
As can be seen from the figure, the bending obviously interferes. At this time, another type of bending knife should be considered for bending.

According to the situation on the left side of the picture, a small scimitar is preferred to avoid the situation.

                               In the case of the right side, a sharp knife should be used to avoid the position, but at the same time, it should be noted that the sharp knife has a sharp head, so its strength is poor, so it cannot be used for bending of thick plates. For the plate thickness, no sharp knife is used, but in the process arrangement, think of a method, such as arranging the pressing riveting nut process after bending.
                              In this case, when a small scimitar cannot avoid the position, a large scimitar must be used to avoid the position.

                             Sometimes large scimitars can't be avoided, and you need to increase the process at this time: first press a stamp on the bending line,

For better bending, you can bend the bend to a certain angle first, avoid hitting the knife, and then press the edge to 90 degrees.

                                 

In general, the embossing process can be applied to the bending that cannot be completed at one time, so that when the second bending is performed, the bending line can be better shaped according to the original bending printing, otherwise the secondary bending is likely to cause bending deviation. Position or bending angle is not well controlled.

Therefore, we must also consider such problems in the design process, and try to avoid using such a process when the requirements are met, because this does not have the effect of direct bending, and the size and angle may be biased.

The bending machine can also be used to press the work piece to the dead side, first bend the work piece to 30 degrees, and then use a flat knife to press the work piece to death. Generally, the press work side that can be completed with ordinary punches should not be arranged to the press machine because The effect of the dead side is relatively better.

CNC Machining & Sheet Meatl & Brushed 

In addition to interference between the workpiece and the bending knife during the bending process, interference with the bending machine may occur when the size of the workpiece is relatively large.

When we arrange the process, many times we must consider whether it is good to bend or not, because bending is a very important process. Whether the bend is easy to operate directly affects the quality of the bend, and many The quality problems that arise from time to time are due to the failure to control the size of the bend. Therefore, special attention should be paid to the problem of bending during the design process. This is related to the quality stability of the product during mass production.

For different plate thicknesses, its bending size is limited and cannot be too small. Generally, it has a relationship with the lower die. The general principle is: the lower die selects a sipe with a thickness of 6 times the plate thickness. Most in line with experience. The general classification of sipes is divided according to the outer width of the sipes, which are slot 6 and 10 respectively.

At the same time, under some special needs, the supplier will also make special bending knives, but if the shape of the tool is more strange or the degree of curvature is greater, it will inevitably affect the rigidity of the tool and shorten the tool life.

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